W83627HF/F
PRELIMINARY
Publication Release Date: November 2000
- 52 - Revision 1.0
Bit 4: When this bit is set to a logical 1, the UART enters diagnostic mode by an internal loopback, as
follows:
(1) SOUT is forced to logical 1, and SIN is isolated from the communication link instead of the
TSR.
(2) Modem output pins are set to their inactive state.
(3) Modem input pins are isolated from the communication link and connect internally as DTR
(bit 0 of HCR)
→
DSR, RTS ( bit 1 of HCR)
→
CTS , Loopback RI input ( bit 2 of HCR)
→
RI and IRQ enable ( bit 3 of HCR)
→
DCD .
Aside from the above connections, the UART operates normally. This method allows the CPU
to test the UART in a convenient way.
Bit 3: The UART interrupt output is enabled by setting this bit to a logic 1. In the diagnostic mode this bit
is internally connected to the modem control input DCD .
Bit 2: This bit is used only in the diagnostic mode. In the diagnostic mode this bit is internally
connected to the modem control input RI .
Bit 1: This bit controls the RTS output. The value of this bit is inverted and output to RTS .
Bit 0: This bit controls the DTR output. The value of this bit is inverted and output to DTR .
4.2.4 Handshake Status Register (HSR) (Read/Write)
This register reflects the current state of four input pins for handshake peripherals such as a modem and
records changes on these pins.
1
2
3
4
5
6
7
0
RI falling edge (FERI)
Clear to send (CTS)
Data set ready (DSR)
Ring indicator (RI)
Data carrier detect (DCD)
CTS toggling (TCTS)
DSR toggling (TDSR)
DCD toggling (TDCD)
Bit 7: This bit is the opposite of the DCD input. This bit is equivalent to bit 3 of HCR in loopback mode.
Bit 6: This bit is the opposite of the RI input. This bit is equivalent to bit 2 of HCR in loopback mode.
Bit 5: This bit is the opposite of the DSR input. This bit is equivalent to bit 0 of HCR in loopback mode.
Bit 4: This bit is the opposite of the CTS input. This bit is equivalent to bit 1 of HCR in loopback mode.
Bit 3: TDCD. This bit indicates that the DCD pin has changed state after HSR was read by the
CPU.
Содержание W83627F
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Страница 99: ...W83627HF F PRELIMINARY Publication Release Date November 2000 90 Revision 1 0 Figure 8 1 ...
Страница 103: ... 0 1 0 1 2 3 45 67 8 67 1 ...
Страница 105: ... 0 1 2 3 4 5 6 7 2 2 7 558 6 7 2 2 3 2 3 9 0 1 2 3 4 5 6 7 2 2 7 558 6 7 2 2 3 2 3 9 ...
Страница 106: ... 4 6I J H 4 4 6I J 9 6I J 9 ...
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Страница 113: ... 0 9 3 3 1 1 3 4 17 3 9 1 0 1 0 1 E 1 8 1 H 1 1 FD DB 1 B H 1 0 6 0 1 6 6 6 1 E 1 6 G 6 4 G 4 6D0 DG 1 1 1 H 1 6 ...
Страница 114: ... 0 1 1 2 3 1 2 3 D D D DD D DD D 0 0 4 3 9 7 3 4 0 0 4 3 9 7 3 4 9 9 9 0 0 4 3 A 9 3 4 0 0 4 3 B 9 43 3 3 4 A 9 C C ...
Страница 115: ... 1 9 4 6D 6D4 L 9 H E 4 6D 0 0 0 1 4 8D 3 D 4 5 6 A 1 9 B H 1 6 ...
Страница 116: ... 4 5 6 A 9 H H 1 6 E E E E E E 4 7 28 5 6 A H 1 8 6 1 H 1 H 1 1 H ...
Страница 117: ... A 9 H 1 6 1 H 1 F 1 E E F 1 E E E E E G ...
Страница 118: ... 4 7 28 5 6 19 H 6 1 H 1 H 1 1 H H 1 6 1 H 1 F 1 E E E F 1 E E E E E ...
Страница 119: ... B A B B 7 28 6 4 6ID J B A H B A 1 4 6ID J B A H B A 1 H B A B A 1 B A 1 H 1 B A 1 F 1 E E E 0 E 3 H 3 ...
Страница 120: ... 2 1 4 0 HD 0 B 4 6 4 6 M 4 6 1 4 8 8 1 4 1 C 1 4 8 5 HD 4 1 H HD 4 4 9 6 2 4 4 D ...
Страница 122: ... 1 1 8 1 2 0 B 0 6 O P 4 O P 8 4 6 9 9 H H B 6 9 B 6 9 9 H H 6 4 D 9D 6 4 D 9D 6 4 D 9D0 ...
Страница 123: ... 2 1 0 H 0 B 6 M 4 9 0 6 6 2 1 6 8 0 B 6 M 4 1 H 4 M 4 6 4 D 6 1 4 6 1 4 A 6 1 4 6 1 4 A 4 M 0 M R CC ...
Страница 124: ... 2 5 1 6 8 0 B 6 M 4 H 4 H 4 D B H 4 B H 4 8 FDB H 4 8 F B H 4 8 B 6 4 H 4 8 B 6 H ...
Страница 125: ... 2 4 5 1 6 8 0 B 6 M 4 9 6 1 4 D B H 4 4 H 4 8 9DB H 4 8 9 B H 4 8 F B H 2 5 6 1 6 8 0 B 6 M 4 9 ...
Страница 126: ... 2 2 5 6 1 6 8 0 B 6 M 4 9 6 1 4 D9 2 1 1 4 2 1 6 8 0 B 6 M 4 1 1 4 9 6 1 ...
Страница 127: ... 2 1 2 6 8 0 B O P O P B 0O P 6 M 4 9 4 D9 4 9 B 0 O P 4 6ID0 J 1 2 5 1 6 8 0 B 4 0 M 0 4 6 9 6 1 4 9 6 9 4 O P ...
Страница 130: ... 2 5 1 6 8 0 B 6 M 0 0 4 4 9 4 HHH HHH 4 4 9 4 HHH HHH 2 4 1 6 8 4 0 B 6 M 45 0 4 45 0 4 0 4 0 4 ...
Страница 136: ... 2 4 6 8 D 0 B 6 M 6 4 0 6 2 1 1 4 6 8 D 0 B O P O P O P 6 M 0 4 0 4 0 4 4 4 4 D 4 4 9 6 1 ...
Страница 137: ... 2 4 7 C 4 6 8 D 1 6 M 8 9 4 0 L 0 L 2 7 C 4 6 8 D4 1 6 M 8 9 4 0 L 0 L ...
Страница 139: ... 2 1 4 6 8 D0 0 B 6 M 0 0 0 0 4 1 4 4 1 4 4 D 1 4 4 6 1 4 4 4 4 1 1 1 1 4 4 4 0 1 4 4 4 0 1 ...
Страница 140: ... 2 1 1 4D 2 1 1 4 2 5 8 1 4 6 8 D 6 M 1 2 3 4 O P 2 5 1 4 6 8 D 6 M 1 3 4 O P 4 9 6 1 ...
Страница 142: ... 2 4 5 8 1 4 6 8 D 0 B 6 M 6 0 1 3 4 4 4 9 6 1 2 5 8 1 44 6 8 DD 0 B D 6 M 1 2 3 4 9 1 9 9 4 ...
Страница 143: ... 2 2 5 1 4 6 8 D 0 B 6 M 1 3 4 1 9 4 4 9 6 1 2 5 8 1 4 6 8 D 6 M 4 9 O P ...
Страница 144: ... 2 5 1 4 6 8 D 6 M 4 O P 4 9 6 1 2 5 1 4 6 8 D 0 B 6 M 4 9D 6 9 6 1 4 9 6 9 B A 1 4 6 9 6 1 4 6 9 B A 4 6 9 ...
Страница 145: ... 2 5 8 8 1 4 6 8 D 0 B 4 6 M 6 0 1 2 3 4 9 9 4 D 2 5 8 1 4 6 8 D 0 B 6 M 6 0 1 3 4 4 4 9 6 1 ...
Страница 146: ... 2 5 8 1 44 6 8 DD 0 B D 6 M 1 2 3 4 9 1 9 9 4 2 5 1 4 6 8 D 0 B 6 M 1 3 4 1 9 4 4 9 6 1 ...
Страница 147: ... 2 4 5 1 4 0F 6 8 D 0 B 6 M 0 4 9 6 1 4 8 B4 H 4 8 DB 4 H 2 5 6 1 4 0F 6 8 D 0 B 6 M 0 4 9 6 1 4 4 2 2 1 1 4 ...
Страница 149: ... 2 4 5 1 44 6 8 DD 0 B 6 M 0 1 2 3 4 9 1 1 2 4 5 1 4 6 8 D 0 B 6 M 0 1 2 3 4 9 1 1 2 4 1 1 42 4 ...